Unit 3 Overview: Prime and Composite

Here’s a summary of what we covered in Unit 3, prime and composite. This is the first unit of entirely new material for 5th grade. Yay!

Skills:

• Skill 6: I can identify factors and multiples.
• Skill 7: I can identify prime and composite numbers up to 100.
• Skill 8: I can use divisibility rules.

Lessons & mini-lessons:

• Prime and Composite: all about factors and multiples
• Skills 6 and 7: using factors and multiples to find primes up to 100 (an ancient algorithm!)
• Skill 7: prime and composite with arrays
• Skill 7: how to find prime and composite numbers
• Primes to 100: a visual pattern
• Skill 8: using divisibility rules to find prime and composite

Extra practice: Download extra practice questions